When I got a screw taken out of my talus, it was the creepiest thing I've ever experienced. If that dude could feel his brain slide and splat, I can only imagine how nasty that must've felt.

One of my old professors explained that during early brain surgery patients were kept awake, just a local was used, as the brain couldn't 'feel', and they would be guided to where they needed to get to by the patients responses of what they experienced when prodded, as the brain would generate signals for each bit of it that was touched. How true that is I'm not sure, but it too sounds freaky.

I've occasionally felt what I thought was my brain move in my head as a result of mega impacts in Rugby.

Also every now and again I get this really disconcerting feeling as if there's an air pocket in the bone on the right side of my skull and a small piece of bone or other had material is inside it rattling about.